From mboxrd@z Thu Jan 1 00:00:00 1970 From: YOSHIFUJI Hideaki Subject: [PATCH net-next] ipv6 mcast: Do not join device multicast for interface-local multicasts. Date: Sat, 09 Feb 2013 23:29:58 +0900 Message-ID: <51165D66.5090200@linux-ipv6.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Cc: YOSHIFUJI Hideaki To: netdev , David Miller Return-path: Received: from 94.43.138.210.xn.2iij.net ([210.138.43.94]:55943 "EHLO mail.st-paulia.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757574Ab3BIO37 (ORCPT ); Sat, 9 Feb 2013 09:29:59 -0500 Sender: netdev-owner@vger.kernel.org List-ID: RFC4291 (IPv6 addressing architecture) says that interface-Local scope spans only a single interface on a node. We should not join L2 device multicast list for addresses in interface-local (or smaller) scope. Signed-off-by: YOSHIFUJI Hideaki --- net/ipv6/mcast.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index e5de4855..3a2849f 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -661,6 +661,10 @@ static void igmp6_group_added(struct ifmcaddr6 *mc) struct net_device *dev = mc->idev->dev; char buf[MAX_ADDR_LEN]; + if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < + IPV6_ADDR_SCOPE_LINKLOCAL) + return; + spin_lock_bh(&mc->mca_lock); if (!(mc->mca_flags&MAF_LOADED)) { mc->mca_flags |= MAF_LOADED; @@ -687,6 +691,10 @@ static void igmp6_group_dropped(struct ifmcaddr6 *mc) struct net_device *dev = mc->idev->dev; char buf[MAX_ADDR_LEN]; + if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < + IPV6_ADDR_SCOPE_LINKLOCAL) + return; + spin_lock_bh(&mc->mca_lock); if (mc->mca_flags&MAF_LOADED) { mc->mca_flags &= ~MAF_LOADED; -- 1.7.9.5